<!doctype html> 
<html lang="zh_CN">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="./css/bootstrap/bootstrap.min.css">
    <link rel="stylesheet" href="./fonts/boostrapicons/bootstrap-icons.css">
    <title>表单</title>
  </head>
  <body>
    <form>
        <!-- form-group 表示一个表单组 -->
        <div class="form-group">
          <!-- 标签 -->
          <label for="exampleInputEmail1">Email address</label>
          <!-- 表单控件 form-control表示提供bootstrap表单控件的样式 -->
          <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
          <!-- 提示信息 form-text提供表单文本的样式  text-muted 提供字体颜色 -->
          <small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
        </div>
        <div class="form-group">
          <label for="exampleInputPassword1">Password</label>
          <input type="password" class="form-control" id="exampleInputPassword1">
        </div>
        <!-- form-check对复选框进行单独设置 -->
        <div class="form-group form-check">
          <input type="checkbox" class="form-check-input" id="exampleCheck1">
          <label class="form-check-label" for="exampleCheck1">Check me out</label>
        </div>
        <button type="submit" class="btn btn-primary btn-block">Submit</button>
      </form>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="./js/plugins/bootstrap/jquery.slim.min.js" ></script>
    <script src="./js/plugins/bootstrap/popper.min.js"></script>
    <script src="./js/plugins/bootstrap/bootstrap.min.js"></script>
  </body>
</html>